Toggle assembly



Jan. 29, 1963 H. P. KAu'rz 3,075,712

I TOGGLE ASSEMBLY Fnd may s, 1961 ATTORNEY United States Patent O FiledMay 8, 1961, Ser. No. 108,640 2 Claims. (Cl. 241-2S5) My inventionrelates to jaw type crushing machines and has particular reference to animproved toggle assembly for stabilizing and guiding a crusher jawmounted at its lower end on an eccentric in such a machine.

It is common practice to stabilize and guide one end of a jaw of an orecrusher by a toggle assembly which causes that end or part of the jaw towhich the assembly is connected to have generally reciprocating motion,but all of them, insofar as I am aware, in order to maintain thecompression required for the toggle when the machine is idling or duringthe inactive or retractive portion of the crushing cycle, require a rod,which is elastically tensioned between the jaw and crusher frame, tohold the ends of the toggle link or plate between the semi-circular(usually concave) seats provided in the jaw and in such lframe. Theprincipal object of my invention, therefore, is to eliminate thenecessity of using such an elastically .tensioned rod and thereby savepower and permit accurate, easy assembly of parts for the purpose ofinst-allation or adjustment.

Another object of my invention is to provide a simple and positive meansof lubricating all bearing surfaces of my invention from a centrallocation.

These and other objects of my invention will become apparent from thespecification and drawings forming a part of this application in which:

FIG. l is a vertical sectional view of crusher jaws showing my toggleassembly applied thereto, and

FIG. 2 is a top plan view of my toggle assembly.

Referring in detail to such drawings, the mechanism comprises crusherjaws designated generally by the letter I, mounted on eccentrics E,above which is disposed a hopper H. Inasmuch as the jaws and hopper formno part of the present invention, they will not be further described.The toggle assemblies are attached to the upper end-s of the jaws andthe supporting frame of the machine and comprise the following parts:

Extending laterally from the rear of each jaw is a plate carrying adivided journal designated generally by the letter B. Such journalcomprises a half journal 4 integral with said plate and a two-partjournal cap 6, which parts are bolted in laterally spaced relationshipto half journal 4. A pivot pin 2 extends through journal B between halfjournal 4 and the parts of the journal cap, and one end of a toggle link1 is pivoted on said pin between the spaced parts of the journal cap.The other end of said link is likewise pivoted on a pivot pin 3, whichpin extends through a journal of the kind just described. The halfjournal 4 on this end of the link, however, is provided with an integrallateral extension 5 which is pivoted at its free end in a clevis 11 on afitted bolt 12. Such bolt is positioned at a right angle to pivot pin 3,thus affording a degree of freedom for the proper alignment of parts ofthe assembly due to the fact that the link 1 may move about two axes atright angles to each other.

Patented Jan. 29, 1963 ICC The closed end or heel of the clevis bearsagainst a vertical wall of the crusher frame and is secured to such wallby a stud bolt 13 and nut 14. The axis of such bolt is perpendicular tothe axes of the fitted bolt 12 and pivot pin 3 for providing anotherfreedom to assure proper alignment of parts of the assembly.

The links and pins may be apertured, hollow, drilled or grooved andprovided with necessary grease fittings to insure adequate lubricationof the bearing surfaces. As shown, they are hollow, and the ends of thepins are plugged by plugs 8 except one end of the pins may be providedwith a grease fitting.

The complete toggle assembly stabilizes and guides the upper part of ajaw in -a generally vertical reciprocating motion as follows: Themachined end of hollow pin 2 can rotate only through an arc of severaldegrees in its motionless lubricated bearing B, and the hollowconnecting rod or link 1, which is securely fastened to the hollow pin2, can only pivot through an arc about the axis of such pin.Consequently pin 2 is guided as indicated for all loads applied to thehollow link 1, whether such loads are compressive, tensile, ortorsional. Also, the axis of pin 2 is guided in an arc about thestationary axis of hollow pin 3, and the radius of this arc can, whendesired, be adjusted by replacing the existing hollow link by a shorteror longer link, or the link may be made adinstable for length bytelescoping or threading two or more sections together. Thus, the gap orfeed opening of the crusher can be adjusted `by the substitution ofvariable length links.

While I have described my toggle assembly as being connected near thetop portion of a jaw, it will be understood that it could be used inother relationships as by being connected to a crusher jaf or pitmannear the lower end thereof where such jaw or pitman is supported nearits upper end on a hinged pivot or the eccentric portion of acrankshaft.

Having thus described my invention, desire to secure by Letters Patentis:

1. A toggle assembly for stabilizing and guiding a crusher jawcomprising a link, two journals and a clevis, the said link beingpivoted at each end thereof in one of said journals for swinging in avertical direction, one of said journals being adapted to be rigidlyconnected to the crusher jaw and the other of said journals beingpivoted in said clevis for swinging in a horizontal direction, the saidclevis being adapted to be rigidly secured to a xed support, wherebysaid jaw may have limited guided movement in two directions at rightangles to each other.

2. The combination as recited in claim 1 wherein said journalsconstitute split bearings.

what I claim and References Cited in the file of this patent UNITEDSTATES PATENTS

1. A TOGGLE ASSEMBLY FOR STABILIZING AND GUIDING A CRUSHER JAWCOMPRISING A LINK, TWO JOURNALS AND A CLEVIS, THE SAID LINK BEINGPIVOTED AT EACH END THEREOF IN ONE OF SAID JOURNALS FOR SWINGING IN AVERTICAL DIRECTION, ONE OF SAID JOURNALS BEING ADAPTED TO BE RIGIDLYCONNECTED TO THE CRUSHER JAW AND THE OTHER OF SAID JOURNALS BEINGPIVOTED IN SAID CLEVIS FOR SWINGING IN A HORIZONTAL DIRECTION, THE SAIDCLEVIS BEING ADAPTED TO BE RIGIDLY SECURED TO A FIXED SUPPORT, WHEREBYSAID JAW MAY HAVE LIMITED GUIDED MOVEMENT IN TWO DIRECTIONS AT RIGHTANGLES TO EACH OTHER.